| 摘要 |
<p>PURPOSE: To reduce the amount of leakage of refrigerant from the whole flexible hose and the amount of its diffusion to the air by loosely inserting an inner hose used as a passageway for a high-pressure fluid into an outer hose used as a passageway for a low-pressure fluid. CONSTITUTION: A flexible hose 1 has a concentric double-tube structure comprising an outer hose 1a that is made of rubber and is used as a passageway for a low-pressure fluid (arrow A); and inner hose 1b that is made of rubber and is loosely inserted in the outer hose 1a to act as a passageway for a high- pressure fluid (arrow B). The outer hose 1a may be a bellows hose made of a metal. As a consequence, the amount of the leakage from the whole hose can be reduced to an extremely low level since the contact area between the flexible hose and the air is small and the inner hose as the passageway for the high-pressure fluid with a greater leakage amount is surrounded by the inner hose as the passageway for the low-pressure fluid with a less leakage amount.</p> |
